Method of producing motive power.



l UNITED. STATES Patented January 31, 1905.

PATENT OFFICE.

l METHOD o|=Y PRODUGING MoTlvE POWER.

SPECIFICATION formngipart of Letters Patent No. 781,481, dated January 31, 1905.

Application filed March 15, 1901. Serial No. 51,321.

To @ZZ whom it marifoon/067%:

Beit known that I, FRANZ WINDHAUSEN, Jr. a subject of theEmperor of Germany, and a resident of 13 Kurfrstendamm, Berlin, inthe German Empire, have invented a new and usei ful Method of Producing Motive Power, of

which the following is a specification, reference being had to the accompanying drawings, forming a part thereof. Y

The object of this invention is the' utilization of the heat present ,in exhaust-steam,

waste gases, water of condensation, &c., as aKV source of motive power in a' turbine arrangement.. For this purposel the exhaust-steam, waste gases,or the like are conveyed to an evaporator--for instance, a coil-4in order by to expand in aParsons, Laval, or other suitable steam-turbine (thereby producing power) to a degree of expansion at vwhich they can be liquefied in a condenser by cooling-water at ordinary temperature. For example, atQOO centigrade the ammonia-vapors are liquefied at eight atmospheres, those of sulfurous acid at 3. 8 atmospheres, and those of carbonio acid at sixty atmospheres. After the condensation has been effected' the liquid ammonia or thev like is returned to the evaporator by a suitable feed apparatus, (pump or injector,) "where it is again vaporized.

Severalformsof cold-vapor-turbine ,arrange-v ,ments or apparatus by which my new and improved method for producing motive power areshown on the accompanying drawings, in which- Figure 1 is a sectional diagram showingan arrangement of parts suitable forthe practice Aof my inventionu Fig. 2 shows a dia- For instance, at a by formed passes through the pipe 2 into the open air or flows to an air-pump. (Not shown.) The cold vapors thus producedflow through they pipe 11 into a superheater E and are superheated directly by furnace-gases or indirectly by steam or other heating medium which enters through the pipe 12 and passes out through the pipe 13. The superheated vapors pass through the pipe 14: to the cold-vapor turbine B, expanding therein and producing motive power. The expanded vapors flow through the pipe iintothe condenser C, where they are condensed by cooling-water. The condensed vapors from the condenser C are conveyed, by means of the feed pump D, through the pipes 7 and 8 back to the evaporator Ain order to be vaporized afresh.

F represents a dynamo driven by the coldvapor turbine. n

The condenser Gis provided with an inletpipe- 5 and an outlet-pipe 6 for the cooling medium. ,Y

Instead of the high-tension cold vapors produced in the evaporator A expanding in only one turbine, as. representedin Fig. l, this expansion may also be effected in two or more turbinesof different capacity, according to the compound or triplex system. In this case the cold vapors when passing from the' first or high-pressure turbine to the second or lowpressure turbine, Src., may also be heated afresh before the following expansion. Such a compound cold-vapor-tur'bine arrangement is represented in Fig. 2, in which the cold vapors are directly superheated by means of furnace-gases and the cold vapors leaving the turbine of smaller capacity are heated again before their final expansion in the second larger turbine.

Waste gases or the like enter the evapora- IOO tor A through pipe 1, heat and vaporizc the ammonia or the like circulating through the C -shaped pipe system, the waste gases or the like passing' olf from the evaporator A through pipe 2 or are drawn olf by an airpump. (Not shown.) The cold vapors thus produced pass through the pipe 11 to the superhcater E, wherein they are siuiierheated by means of furnace-gases or thielike admitted at 12 to the superheater E and discharged at 13. The superheatcd high-pressa'c cold vapors are conveyed through the pipe 14 into the high-pressure cold-vapor turbine L, expand therein,and pass through the pipe 15 into the receiver Gr in order to be heated again by means of any source of heat*for instance, live steam entering through pipe 16 and leaving through pipe 17-and then liow through the pipe 18 into a second low-pressure turbine H of greater capacity. After having expanded therein they are conveyed through the pipe 4t into the condenser C. Here the vapors are condensed by means of cooling-water passing the pipe system in counter-current and entering through pipe 5 and leaving through pipe 6. The condensed vapors are returned in a liquid state, by means of pump D,through pipes 7 and 8 to the vaporizers.

If the cold-vapor turbines above described are driven by means of superheated cold vapors, their working will be the more economical the higher the vapors are superheated beyond their temperature of saturation, (evaporator temperature.) This evaporating temperature usually being comparatively low (about 50O to 70O centigrade) on account of the low boiling-point of the working liquid, a very high superheating of the cold vapors may take place without any damage of the machines; but this very high superheating of the cold vapors may not be completely made use of in consequence of the proportionately little difference of the pressure of the evaporator and condenser or in consequence of the little dilference of temperature resulting by the expansion of the vapors from the pressure of the evaporator to that of the condenser, and therefore it may happen that the expanded cold vapors enter the condenser in a still highly-superheated state and that here the retained superheating heat has to be destroyed by the cooling-water without yielding motive power. In order to avoid this disadvantage, I proceed as follows: The highpressure cold vapors produced in the evaporator are conveyed to a regenerator, in which they are heated according to the counter-current system by means of the still superheated cold vapors passing from the turbine to the cn- I I time, expanding said superheated vapors in a denser, then enter a superheater in order to be so highly superheated that they are in a still su perheated state after their expansion in one or more turbines, then pass to the regenerator, where they heat the cold vapors flowing from the evaporator to the superheater, thereby being cooled, and at length enter the condenser at about their evaporator temperature in order to bc returned to theevaporatorafter their condensation. The expanded cold vapors passing' from the regenerator to the condenser and still having nearly evalmrator temperature may also be used to heat liquid annnonia or the like fed by means ol the pump into the evaporator.

lt needs no mention that the cold-vapor turbine,according to Figs. l and 2, maybe coupled in a suitable manner with a steam-turbi ne fu rnishing the waste steam.

1n order to avoid loss of heat by condensation and for the pu rposeof more economically making use of the heat available, the cold-vapor turbines may be provided with a jacket (not shown) in which steam or any other heating medium is caused to circulate.

1t is obvious that the cold-vapor turbines and the other parts of the machine have to be provided with suitable regulating contrivances, safety-valves, littings, and the like.

The different arrangements represented only diagrammatically in the drawings show some apparatus in which to carry ont my invention. The evaporator, sinierheater, condenser, &c., of course may also be ol' any other suitable form or construction.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is 1. The herein-described method of producing motive power from exhaust-steam, waste gases and the like which consists in Vaporizing by the heat of exhaust-steam, waste gases and the like cold-vapor liquids having a boiling-point below OC centigrade under atmospheric pressure, expanding the vapors thus produced in an elastic-Huid working turbine, superheating said vapors by exluulst-vapors, expanding the said superheated vapors ina larger elastic-fluid working turbine, cooling and condensing said vapors and then evaporating afresh the liquids thus obtained, substantially as herein described and for the purpose set forth.

2. The herein-described method of producing `motive power from exhaust-steam, waste gases and the like which consists in vaporizing by the heat of exhaust-steam, waste gases` and the like cold-vapor liquids having a boiling-point below OO centigrade under atmospheric pressure, superheating the vapors thus produced in a suitable manner, expanding said superheated vapors in an elastic-Huid workying turbine, superheating said vapors a second larger elastic-fluid working turbine, cooling and condensing' said vapors and then evaporating afresh the liquids thus obtained, substantially as herein described and for the purpose set forth.

3. The herein-described method of produc- ICO ing motive power from exhaust-steam, waste gases and the like which consists in Vaporizing by the heat of exhaust-steam cold-vapor liquids having a boiling-point below 0O centigrade under atmospheric pressure, superheating the vapors thus produced by exhaust-vacentigrade under atmospheric pressure, su-

perheating the vapors thus produced in a suitable manner, expanding said superheated vapors, superh'eating said vapors, expanding said superheated vapors, cooling and condensing said vapors, and vthen evaporating afresh the liquids thus obtained,substantially as herein described and for thepurpose set forth.

In witness whereof I have hereunto set my hand in presence of two witnesses.

FRANZ WINDHAUSEN, JR.

Witnesses WOLDEMAR HAUPT, e HENRY HASPER. 

